please review: Ticket 47440 - Fix compilation warnings

[Lukas Slebodnik]

https://fedorahosted.org/389/ticket/47440

https://fedorahosted.org/389/attachment/ticket/47440/0001-Fix-compilation...
https://fedorahosted.org/389/attachment/ticket/47440/0002-Use-right-proto...
https://fedorahosted.org/389/attachment/ticket/47440/0003-Do-not-include-...
https://fedorahosted.org/389/attachment/ticket/47440/0004-Explicitly-spec...